[issue12356] more argument error improving

[Roundup Robot]

Roundup Robot <devnull at devnull> added the comment:

New changeset 52744a5a9260 by Benjamin Peterson in branch 'default':
give the names of missing positional or keyword-only arguments (closes #12356)
http://hg.python.org/cpython/rev/52744a5a9260

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nosy: +python-dev
resolution:  -> fixed
stage: patch review -> committed/rejected
status: open -> closed

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Python tracker <report at bugs.python.org>
<http://bugs.python.org/issue12356>
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